They have held up fine. I took them out the other day to clean and gap them. Gap is .03
Found this interesting chart with some good info on the codes for the spark plugs.
https://online.flippingbook.com/view/17923346/4/#zoom=true
I am thinking about using some BPR5ES. Only reason I would be hesitant is because they are 'P' projected insulator type which is quite a bit larger sticking out of the engine. My thinking is that it shouldn't make a difference in the operation as more insulation shouldn't hurt anything? Heat rating are both '5' (Medium) and thread reach 'E' is 19mm, 3/4" so internal clearance is good.
Seat: Flat | Seat: Flat |
Thread Size: 14mm | Thread Size: 14mm |
Heat Range: 5 | Heat Range: 5 |
Resistor Type: Yes | Resistor Type: Yes |
Hex Size (in): 5/8 Inch | Hex Size (in): 13/16 Inch |
Washer Included: Yes | Washer Included: Yes |
Preset Gap (in): 0.036 Inch | Preset Gap (in): 0.036 Inch |
Thread Reach (in): 0.750 Inch | Thread Reach (in): 0.750 Inch |
Ground Configuration: Standard | Ground Configuration: Standard |
Ground Electrode Core Material: Nickel | Ground Electrode Core Material: Nickel |
Number Of Ground Electrodes: 1 | Number Of Ground Electrodes: 1 |
Center Electrode Core Material: Copper | Center Electrode Core Material: Copper |
Center Electrode Tip Material: Nickel | Center Electrode Tip Material: Nickel |
Ground Electrode Tip Design: Standard | Ground Electrode Tip Design: Standard |
Approximate Resistor Value (Ohm): 5000 Ohm | Approximate Resistor Value (Ohm): 5000 Ohm |
Insulator Height (mm): 50.5mm | Insulator Height (mm): 55mm |
Electrical Terminal Type: Non-Removable Nut | Electrical Terminal Type: Removable Nut |
Center Electrode Design: Standard | Center Electrode Design: Standard |
Service Number: BKR5E | Service Number: BPR5ES |
